Ingot-mold.



W. VOLLMER & A. P. GIBBONEY. INGOT MOLD.

APPLICATION FILED JUNE 17. 1912.

Patented Jan. 28, 1913.

Imam/ 0715? WzLZZzarw' l Vallrncr UNITED STATES PATENT OFFICE.

WILLIAM VOLLMER AND ADOLPH'US F. GIBBONEY, OF BURNHAM, PENNSYLVANIA,

ASSIGNORS TO THE STANDARD STEEL WORKS COMPANY, OF BURNHAM, PENN- SYLVANIA, A CORPORATION OF PENNSYLVANIA.

' INGOT-MOLD.

Specification of Letters Patent.

Patented Jan.2s,1913.

Application filed June 17, 1912. Serial No. 704,195.

. United States, residingin Burnham, county of Mifilin, State of Pennsylvania, have invented certain Improvements in Ingot- Molds, of which the following is a specification.

The object of our invention is to provide means for casting steel ingots, so'as to reduce that portion of the ingot which must be removed due to piping or unevenness. This object we attain in the following manner, reference being had to the accompanying drawing, in which Figure 1, is a vertical sectional view of an ingot mold illustrating our invention and showing the ingot in position; Fig. 2, is a plan view; and Fig. 3, is a sectional plan view on the line 33, Fig. 1.

Referring to the drawings, A is the mold having a pouring o ening either at the top or at the bottom. The pouring opening, in the present instance, is shown at the top. A mold of this type is usually filled from the top or from the bottom. The upper end of the mold is recessed for the reception of a sand ring or core B and between the said ring and the body of the mold is a non-conducting lining C of asbestos or magnesia. The internal diameter of the ring is prefela ably the same'as the internal diameter of the mold, so that the upper portion of the ingot is not contracted when being poured.

D is a metallic plate, mounted upon the top of the ingot mold, having perforationsd to allow the gases to escape as the ingot cools.

2' is a layer of black lead which is placed upon the molten metal after it is poured, so as to retain the heatand yet allow the gases to pass ofl' therethrough and through the erforations in the plate D. This layer of black lead is usually about an inch in thickness.

The ring or core B is made of molding or core sand and as it is a poor conductor, it will allow the top of, the molten ingot to retain its heat so that the metal will set with the least amount of piping.

The lining of asbestos or magnesia prevents the heat passing from the sand ring to the body of the mold and by covering the top of the ingot with black lead, this also assists in retalning the heat. Conseqeuntly, the top of the mold cools very slowly and prevents piping.

The operation is as follows :-The mold is placed in position with the sand ring set in the recess in the upper part of the mold. The molten metal is then poured into the mold, referably from the top and, when the mold is filled to the proper hei ht with the molten metal, the layer of blue lead is then placed on the metal and the perforated plate is placed in position upon the mold. The mold is then allowed to gradually cool and we find that as it cools a solid ingot is the result with, perhaps, a slight honeycombing at the upper surface, which can be out after the ingot is taken from the mold; the result being a solid ingot of superior quality.

We claim i The combination of an ingot mold having a recess 'at its upper end; a sand ring in the recess and an asbestos lining mounted between the ring and the inner wall of said recess; with a section of black lead placed in the ingot mold on top of the ingot and within the sand ring.

In testimony whereof, we have signed our names to this specification, inthe presence of two subscribing witnesses.

WILLIAM -VOLLMER. ADOLPHUS F. GIBBONEY.

Witnesses:

WM. H. WREN, W. E. MACK. 

